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Clips tensor values to a specified min and max.
tf.clip_by_value( t, clip_value_min, clip_value_max, name=None )
Given a tensor t
, this operation returns a tensor of the same type and shape as t
with its values clipped to clip_value_min
and clip_value_max
. Any values less than clip_value_min
are set to clip_value_min
. Any values greater than clip_value_max
are set to clip_value_max
.
Note:clip_value_min
needs to be smaller or equal toclip_value_max
for correct results.
Basic usage passes a scalar as the min and max value.
t = tf.constant([[-10., -1., 0.], [0., 2., 10.]]) t2 = tf.clip_by_value(t, clip_value_min=-1, clip_value_max=1) t2.numpy() array([[-1., -1., 0.], [ 0., 1., 1.]], dtype=float32)
The min and max can be the same size as t
, or broadcastable to that size.
t = tf.constant([[-1, 0., 10.], [-1, 0, 10]]) clip_min = [[2],[1]] t3 = tf.clip_by_value(t, clip_value_min=clip_min, clip_value_max=100) t3.numpy() array([[ 2., 2., 10.], [ 1., 1., 10.]], dtype=float32)
Broadcasting fails, intentionally, if you would expand the dimensions of t
t = tf.constant([[-1, 0., 10.], [-1, 0, 10]]) clip_min = [[[2, 1]]] # Has a third axis t4 = tf.clip_by_value(t, clip_value_min=clip_min, clip_value_max=100) Traceback (most recent call last): InvalidArgumentError: Incompatible shapes: [2,3] vs. [1,1,2]
It throws a TypeError
if you try to clip an int
to a float
value (tf.cast
the input to float
first).
t = tf.constant([[1, 2], [3, 4]], dtype=tf.int32) t5 = tf.clip_by_value(t, clip_value_min=-3.1, clip_value_max=3.1) Traceback (most recent call last): TypeError: Cannot convert ...
Args | |
---|---|
t | A Tensor or IndexedSlices . |
clip_value_min | The minimum value to clip to. A scalar Tensor or one that is broadcastable to the shape of t . |
clip_value_max | The minimum value to clip to. A scalar Tensor or one that is broadcastable to the shape of t . |
name | A name for the operation (optional). |
Returns | |
---|---|
A clipped Tensor or IndexedSlices . |
Raises | |
---|---|
tf.errors.InvalidArgumentError : If the clip tensors would trigger array broadcasting that would make the returned tensor larger than the input. | |
TypeError | If dtype of the input is int32 and dtype of the clip_value_min or clip_value_max is float32 |
© 2020 The TensorFlow Authors. All rights reserved.
Licensed under the Creative Commons Attribution License 3.0.
Code samples licensed under the Apache 2.0 License.
https://www.tensorflow.org/versions/r2.3/api_docs/python/tf/clip_by_value